Merge branch 'qa-update-select2-dropdown' into 'master'

Update select2 dropdown check

See merge request gitlab-org/gitlab!30219

qa/qa/page/component/select2.rb

@@ -36,7 +36,7 @@ module QA
         end
 
         def dropdown_open?
-          has_css?('.select2-input')
+          find('.select2-focusser').disabled?
         end
       end
     end